# Answer to Question #66262 in Classical Mechanics for Hasindu

Question #66262

The surface area of the blades of a windmill is A. Wind flows perpendicular to the blades at a uniform speed of V. When this happens the blades of the windmill rotates at a uniform angular velocity of w. Suddenly the wind stops and the blades come to rest in t seconds. The moment of inertia of the blades around the axis is I and density of the air is given as p. Build a expression for the efficiency of the windmill using A, V, w, t, I and p.

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